Milling attachment for metal-lathes.



H. G. HAASE.

MILLING ATTACHMENT FOR METAL LATHES.

APPLIOATION FILED OUT 7, 1911. 1,038,57 1 Patented Sept. 17, 1912.

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H. G. HAASE.

MILLING ATTACHMENT FOR METAL LATHES.

APPLICATION FILED ()0T- 7, 1911.

Patented Sept. 17, 1912.

2 SHEETS-SHEET 2.

llllil'lnllliiill/lll/ IIWIIIIIllWl/d M'lnesses: J [aver 0502".- fi if[7 51277071. Gfircrse. y a. M411 1 HERMAN G. HAASE, OF MINNEAPOLIS,MINNESOTA,

MILLING ATTACHMENT FOR METAL-LATHES.

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Specification of Letters Patent.

Application filed October 7, 1911. Serial neesaiaa To all whom it mayconcern:

Minneapolis, in the county of Hennepin and State of Minnesota, haveinvented certain new and useful Improvements in Milling Attachments forMetal-Lathes, of which the following is a specification.

My invention relates to a milling attachment for metal lathes and hasfor its object the construction and application of adevice which may beattached to the ordinary standard lathe structure and thereby convertsaid lathe into a machine for cutting gears, milling out key ways andslots, or doing any form of flat milling.

A primary object of my-invent-ion is to provide an attachment of theabove descrip-- tion in combination withethe lathe mechanism, forcutting gears, and to that end I apply to the lathe spindle a detachableindexing mechanism for rota-ting the lathe spindle and governing suchrotation to properly index the gear to be cut.

My attachment is applied to the standard engine lathe without, anyalterations or rearrangement of the parts of said lathe, and does not inany respect interfere with the common functions of the lathe. At thesame time all of the feeding and controlling devices of the lathe areavailable in connec tion with my attachment for effecting the aforesaidmilling operations. Ata comparatively small cost, therefore, by the useof my attachment an engine lathe may be fitted" for doing the work of agear cutting and milling machine of the full size of the lathe,thusvcombining inone machine the att-ri butes and functions of two.

In the-drawings, illustrating the application of my invention in oneform,Figure 1 1s a front side elevation of a portion of a lathe with myattachment applied thereto. Fig. 2 is a section through the adjustablebeveled gear drive for my attachment. Fig.

3 is a top plan view showing the manner of attaching the indexing deviceto the lathe spindle. 1 1g. 4 is a section taken on line 44 of Fig' 3'."Fig. 5 is a detail showing the split nut for efiecting attachment of theindexing device to the hollow lathe spindle. Fig. 6 is a detail view ofthe shaft bearings for my attachment. Fig. 7 is a sectional elevat-ionthrough the center of the upright standardof the cutter holder. Fig. 8isa plan of said upright standard and the parts mounted therein. Fig. 9is a plan view of a modification for vertical plane.- Y

The lathe frame 10 is supported upon legs 11 and provided with a maindriving spindle 12, having thereon a cone pulley 13 for connection witha source of power not shown. The shaft 12 is hollow, as-clearlyindicated in Figs. 3 and 4, and the cone pulley 13 is mounted on asleeve 14 and pro vided with the usual means for connecting the same torotate shaft 12, or not, as desired. The hollow shaft 1.2 is the spindleof the lathe, being provided witha head stock center 15 and a face platedisk 16, a similarly positioned clamping mandrel point 17 on a tailstock 18 on the frame of the lathe providing the means for centeringandclamping the work to be operated upon. A brace or work-holder 19adapted to extend from face plate 16 and be clamped to the .workby meansof set bolt 20 provides means drive at will. The tool rest 22 is alsoadapted to be driven by means of a shaft 24, con nected by means ofboxed gearing 25 with a driving shaft 26 having thereon a cone pulley 27for connection with a driven member of. the machine. The shaft 24 isadapted to operate through friction gearing and feed mechanism, notshown, engaging rack 28 on the side of the lathe bed 21 to provide abelt driven feed for the tool carriage 22. The tool holder propercomprises a main bed 29 transversely movable on tool bed 22 by means ofhand screw 30 a secondary bed 31, which is adapted to be rotatedon bed29, and a third bed 32 slidable on bed 31, through the operation of handscrew 33. For turning spindle 12 so as to position Patented Sept.17,1912.

operating the cutter in a heavy work independently of the correlatedouter ends.

spindle 12. All of the above described parts are or may be well knownstructural features of the standard engine lathe, and,

taken by themselves, form no part of my to the aforesaid threaded endsof members .38 and 39 and upon each of these turn nuts rests a bearingmember 42 centrally apertured to receive the threaded ends 43 of rods orarms 38 and 39 and provided with bearings 44 at one side of said centralapertures for the reception of a cross rod 45., which is secured bymeans of set bolts 46 to said bearing blocks 42. By this arrangement thearms 38 and 39 are adapted to be adjustably positioned on shaft' 34 andthe bearing locks 42 on said arms are capable of adjustable positioningvertically by meansiof hand nuts 41, but are held spaced in parallelrelation by means of the cross rod.45. A brace 47 may be secured to ahorizontally disposed portion 48 of rod 39, said brace being bolted at.49 to the cap piece 50 over the inner bearing for spindle 12, by which 5means the frame formed of rods 38,39 and 45 will be held in the desiredangular position relative to shaft 34. If desired, a collar 51 may besecuredto shaft 34 torestrain yoke head 40 on support 38 from possible49 longitudinal movement on shaft 34. Each of bearing blocks 42 isprovided with horizontally disposed bearings 52 for thereception of ashaft 53, said shaft being held from longitudinalmovement in saidbearings by 5 means of collars 54 and 55 fast on said shaft. Shaft 53has thereon a pulley 56, by means of which said shaft is driven throughbelt 57 extending to one of the members of cone-pulley 13. At the innerend of shaft 53 5 is a bevel ear 58- meshing with a'bevel gear 59 ofpecu iar construction, as shown-in detail in Fig. 2. The bevel gear 58is provided ."with an inwardly extending sleeve 60 rotating within abearing 61 formedin a tubular 55 portion 62 connecting a gear-holder 63with the bearing block" 42 on support 38. Gearholder 63 comprisesanother tubular bearing member 64 similar to and disposed at a suit- 1able angle with bearing 61. A sleeve 65 on so bevel gear 59' isrotatably secured within 3 bearing 64 bymeans of a cap collar 66threaded into said bearing, as hereinafter described. By this meansbevel gears 58 and 59 are held infixed 'meshin engage- 65 ment, althoughfreely rotatable. he bevel Turn nuts 41 are threaded on adjustable instandard 81.

gear 59 is formed with an interiorcavity 67 having the inner wallsthereof rounded as shown at 68 and the outer walls beveled as shown at69, the interior walls of this cavity being spherically formedasindicated at 70. 70 Part 'of said cavity, as clearly shown, is formedin the cap piece 66, which is provided with a sleeve member 71 forthreading portion of sleeve 65 and cap 66. 'If desired, 5

screws 76' may additionally secure bearing members 76 to sleeve 65,although such screws are not necessary since when cap 69 is secured inposition with-the inwardly extended portion 71 thereof threaded intosleeve 65, members 76 will be held in swivelmg position without anyadditional fastening means. This structure connects square shaft 73 withbeveled gear 59 sothat said shaft will rotate with said gear but be'free 5 to oscillate therein in any direction by reason of the universaljoint connection provided, by ball 72 and lugs 75. I

I provide a cutter holder 77 ofthe form shown in Fig. 1, having sidestandards 7879, a base plate 80 and a ,central upright tubular standard81, the same being adapted to be secured to upper bed 32 of the lathetool holder by means of a bolt 82, the connection being effected throughthe usual means provided on the tool holder for securing lathe toolsthereto. Tubular standard 81 comprises a central vertical bearing for ashaft 83, as hereinafter described, the upper end or head 84 of shaft 83being connected'by means of universal joint 86 with shaft '73. Upon thelower end of shaft 83 is secured in the usual way a gear cutter orm1ll1n tool 87 of any form required for the work in hand. The holder orstand 77 is shown in detail in Fig. 7, in which the spindle or shaft 83is shown as upwardly taperupward portion thereof having a pair of nuts91 securing the same down upon a fiber or other type of washer 85, thetapermg form of the spindle permitting the same tobe taken up tocompensate for anywear, so that thev bearin s. may at all times fittightly. The spindle 83 is surroundedby a bushing of browser othersuitable material 91 set within a tubular aperture formed eccentricallywithin a sleeve 92 vertically The thickened portion of sleeve 92 hasformed therein a 130 longitudinal semicircular slot 93 and an annulargroove 94 near the upper portion of said slot 92. The standard 81 isprovided with a correspondingly formed but into-- riorly threadedsemicircular slot 95, slot 93 belng formed wit-h a peripheral diameterequal to the peripheral diameter of slot 95 to the bottoms of thethreads cut therein,

- 92, an elongated semicircu ar slot 98 being vertically in the standard81.

' than a horizontal plane.

cut in standard 81 and opening from the top thereof to permit theannular flange 97 of pin 96 to move longitudinally when said pin isscrewed up or down in threaded slot 95,- the upper end of the pin beingsquared off, as shown at 99, ior that purpose.

When the parts are assembled, as shown in Fig. 7, by rotating pin 99,sleeve 92 and theparts carried thereby will be adiusted A washer 100,similar to washer 85, either or both of which may be of fiber or othermaterial as de-' sired, is placed between lip 90 and the lower endof'bushing 91 and sleeve 92. The spindle 83 is provlded with a conicalcavity 101 for receiving the tapered shank 102 of the cutter tool whichis of usual construction. I provide an aperture extending from the upperend of cavity 101 into a transverse keyway 103 in spindle 83 above thetop of standard 81 and in this aperture is a bolt 104 having a headedend 105 extending into the said keyway. By using a wedge key the cuttercan readily be forced from its seat when it is desired to change thesame.

In Fig. 9 is shown a device adapted to be secured to the spindle 83 fortransmitting rotary motion to a cutter in a vertical rather Thisattachment comprises a gear casing 106 adapted to fit over the lower endof sleeve 92. A. beveled gear 107 provided with a shank 108, similinesat 111. A beveled gear 112 on a shaft 113 journaled in gear holder 106meshes with beveled gear 107, shaft 113 being provided with ataperingcavity 114 for receiving the shank 102 of a holder for the cutter 87. Itwill be seen, therefore, that to change from a cutter operating in ahorizontal plane to one operating in a vertical plane, it will benecessary only to drive out the vertically positioned cutter shank andreplace the attachment shown in Fig. 9. The outer end of shaft 53 isprovided with a cone pulley 88 so that by means of belt 89 connectionmay be made through cone pulley 27 with feed driving shaft 26 tocorrelate operation of the milling cutter of my attachment with thefeeding mechanism of the lathe.

To adapt my attachment to the cutting of gears it is necessary toarrange in connection with the lathe spindle 12 an indexing device. Asalready indicated the spindle 12 1s made hollow. A worm wheel 114 isprovided with a tubular sleeve 115 having an aperture 116 extendingcentrally through the body of the wheel and the sleeve, said sleevebeing journaled in a member 117 provided with an arm 118 extending atright angles to'member 117 or parallel with aperture 116. A pin 119having an expanded head 120 at one end and being threaded at the otherend is splined to worm wheel 114 and sleeve 115. Surrounding the pin119, adjacent the expanded head thereof, is a split sleeve 121, asclearly shown in Fig. 5,

which is normally of a sizeadapted to be inserted within the opening ofhollow spindle 12. The arm'118 is positioned relatively to. pin 119 sothat when the same, together with sleeve 121, is inserted within spindle12, arm 119 will lie upon the top of cap 122 closing the bearing forspindle 12. To secure this arm rigidly to the cap 1 bolt thereto a pairof lugs 123 and 124, spaced apart to receive arm 118 between the same,and secure the arm fixedly in position by means of a set bolt 125, af-

ter which, by means of a nut 126 on the threaded end of pin 119, saidpin is drawn outwardly within split sleeve 121 with the result that saidsleeve is expanded to cause the same to firmly grip the lnterior ofspindle 12 so that said spindle will be clamped to rotate with Wormwheel 114. Member 117 is provided with an ofiset bracket portion 127 towhich is clamped an index disk 128 in which is journaled a shaft 129pro-' vided with an arm 130 for operating worm wheel 114, said shaft 129also having a crank handle 131 and an adjustable index finger 132thereon, the indexing mechanism itself being a structure of common use.By these means I secure this indexing mechanism so that the samecooperates with the spindle of the lathe adapting said lathe incombination with my milling attachment to be used as a gear cuttingmachine.

The operation of my device has been. largely given in connection withthe detailed description thereof. By means of the hand nuts 41 theposition of shaft 53 and the driving pulley 56 thereon may be adjustedto tighten the belt for effective driving action. In the form ofattachment 7 73 with gear 59 and the sliding connection of said shaftwith said universal connectionpermitting traversing movement of saidcutter mechanism while the same is being rotated. .When the gear slot iscompleted, the machine feed is thrown off, the carriage returned toinitial position by well known hand operative mechanism thereon, and bymeans of the indexing mechanism hereinbefore described, spindle 12 willbe turned sufiiciently to position .the gear blank for cutting the nextgear slot, which operations will be repeateduntil the gear is completelycut. For cutting bevel gears the blank may be held on the spindle bymeaps of a chuck or otherwise, and the compound rest turned in a" wellknown manner to present movement of the cutter thereon in a lineparallel with the face elements of the beveled blank and upper bed 32 befed by hand operative worm- 33 to cut the bevel gear slots, theindexing" for the bevel gear being performed the same as for separategears. In milling keyways, slots or any form offlat milling, the workwill be held between points 15 and 17 and the Y carriage 22' fed alongto effect-progressive milling action by the lathe feeding mechanismcorrelated withthe driving mechanism for the milling cutter ashereinbefore described;

The use of the attachment for milling in a vertical plane, wherebyspiral cutting,- rack cutting, etc.,'may be accomplished, will beobvious. It will be apparent, therefore,

" that with my attachment the ordinary lathe can be made to perform allof the operations of the most complicated modern milling machines inaddition to its usual functions as a lathe.

I- claim: j

1. In combination with the spindle and tool carriage of a metal lathe, amilling device removably-mounted directly upon said carriage andincluding a vertical shaft adapted to recelvea-millin'g toolof usualconstruct on, a drive rod having :univers'al joint connection withsaidshaft, and means operated directly from the lathe for driving saidrod with which the same is slidably connected.

2. In combination with the spindle and tool carriage of a metal lathe, amilling device removably mounted directly upon said carriage andincluding a vertical shaft construction, a shaft mounted above the lathespindle and driven therefrom, a bevel gear mounted at a fixed angle toand driven by the shaft, and a driving shaft slidably mounted in saidbevel gear and having uni-' versal-joint rotative connection therewithand with the vertical shaft.

3; In combination with the spindle and tool carriage of a metal lathe, amilling device removably mounted directly upon said removably secured tothe lathe frame and extending outwardly above the spindle, a shaftjournaled in said frame parallel with and driven from the cone pulley ofthe lathe spindle, 'a bevel gear on one end of said shaft, a gear casingrigid on said frame and provided with a bearing for said shaft, a bevelgear heldvin mesh with said first gear and at a fixed angle with theshaft by said vgear casing, and a driving shaft slidably havinguniversal-joint rotative connection therewith and with the verticalshaft.

4. In combination with the spindle and tool carriage of a metal lathe, amilling device removably mounted directly upon said carriage. includinga vertical shaft, a frame removably secured to the lathe frame andextending outwardly above the spindle, a shaft'journaled in said frameparallel with and driven from the cone pulley of the lathe spindle,means for'driving the tool carriage feed from said shaft, and extensiblemeans having universal joint connection with the vertical shaft and.with the horizontal shaft for operating the former from the latter.

5. In combination with the Spindle and .tool carriage of a metal lathe,a milling .device removably mounted directly upon said carriageincluding a vertical shaft, a frame ,removably secured to the latheframe and extending outwardly above the spindle, a shaft journaled insaid frame parallel with and driven from the cone pulley of the latheprovided with a bearing for saidshaft, a

gear casing, a member mounted for univerwith. an angular'opening, and adriving shaft constructed and arranged to slide in said opening, andhaving'universal 'joint connection with the vertical-shaft.

6. In' combination with the spindle and tool carriage of a metal lathe,a milling device-mounted on said carriage in position to operate on workheld by said spindle, said milling device including a vertical shaft,.ahorizontal shaft having driving connection with the lathe, and meansincluding a flexible connection direct to said" vertical shaft adaptedto receive. a milling tool of usual carriage including a vertical shaft,a framespindle, abevel gear on one end of said shaft, a gear casingrigid'on said frame and bevel gear held in mesh with said first gearandat a fixed angle with the shaft by said mounted in said last named bevelgear and sal movement in said last gear provided for driving thevertical shaft from the horizontal shaft.

7. In combination with the spindle and tool carriage of a metal lathe, amilling device mounted on said carriage in position to operate on workheld by said spmdle, said milling device including a vertical shaft, ahorizontal shaft having driving connection with the lathe, a bevel geardriven by the horizontal shaft, a member in the bevel gear mounted foruniversal movement, and a shaft connected by universal joint with saidvertical shaft and having sliding connection with said member in thegear, whereby r0- tary movement of the gear will be transmitted totheconnecting shaft and to the vertical shaft when the milling device isin different positions on; the lathe bed.

8. In combination with the spindle and tool carriage of a metal lathe, amilling device mounted on said carriage in position to operate on workheld by said spindle, said milling device including a vertical shaft, ahorizontal shaft having driving connection with the lathe, means drivenfrom the horizontal shaft for feeding said carriage along the lathe bed,and extensible means connecting said vertical shaft operatively withsaid horizontal shaft for rotating the said'vert ical shaft while thecarriage is being fed.

9. In combination with the spindle and tool carriage of a metal'lathe, amilling de vice mounted on said carriage in position to operate on workheld by said spindle, said milling device including a vertical shaft, ahorizontal shaft having driving connection with the lathe, means drivenfrom the hori zontal shaft for feeding said carriage along the lathebed, a bevel gear driven b the horizontal shaft, a member in the bevegear mounted for universal movement, and a shaft connected by universaljoint with said vertical shaft and having sliding connection with saidmember inthe gear, whereby rotary movement of the gear will betransmitted to the connecting shaft and to the vertical shaft while thecarriage is being fed. 5.

-10. In combination withthe spindle and tool carriage of a metallathe, amilling device mounted on said carriage in posltion to 'operateon' workheld by said spindle, said d'evice'comprismg a'frame adapted to beremovablysecuredto said carriage, a vertical sleeve in said frame, meansfor ad- 'justing sald sleeve vertlcally a vertlcal shaft rotatablymounted in .sai sleeve, and

tool carriage of a metal lathe, a milling device removably mounteddirectly upon said carriage and including a vertical shaft adapted toreceive a milling tool of usual construction, a drive rod havinguniversaljoint connection with said shaft, means operated directly fromthe lathe for driving said rod with which the same is slidablyconnected, and means for adjusting said vertical shaft longitudinallyproperly to position the milling tool.

12. In combination with the spindle and tool carriage of a metal lathe,a frame memher for a milling device adapted to be removably secured u onsaid carriage, a sleeve vertically mounte in said frame member, saidsleeve being provided with a vertical bearing eccentrically positionedtherein and with a semicircular groove extending along the outside ofthe thicker port-ion of said being cut away to provide clearance forsaid collar, a tool-holding shaft rotatably mount- 7 ed in'said bearingand means having operative connection with the lathe for rotating saidshaft.

13. In combination with the spindle and tool carriage of a metal lathe,a milling device mounted on said carriage in position to operate on workheld by said spindle, means for feeding the carriage, means for drivingthe milling .device from the lathe while the carriage is being fed, andan indexing device comprising a frame, a worm wheel mounted thereon, apin extending centrally through said worm wheel havlng an expanded head,a spl t sleeve surrounding said pin adapted to be inserted within Said sindle, and means for extending the expan ed head within the sleeve tocause the sleeve to grip the spindle, whereby the indexing device'mayoperate-to rotate the spindle to properly position a gear blank.

- In testimon whereof I afiix my signature in presence 0 two witnesses.

V v HERMAN G. HAASE.

, Witnesses: i

' F. A. vWiazrrnmstr,

H. A. Bowman

